CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG The GRP_ACK_MSG handler in tipc_group_proto_rcv() currently decrements bc_ackers on every inbound group ACK, even when the same member has already acknowledged the current broadcast round. Because bc_ackers is a u16, a duplicate ACK received after the last legitimate ACK wraps the counter to 65535. Once wrapped, tipc_group_bc_cong() keeps reporting congestion and later group broadcasts on the affected socket stay blocked until the group is recreated. Fix this by ignoring duplicate or stale ACKs before touching bc_acked or bc_ackers. This makes repeated GRP_ACK_MSG handling idempotent and prevents the underflow path.
Засегнати продукти
- Linux Linux: 2f487712b89376fce267223bbb0db93d393d4b09 преди a7db57ccca21f5801609065473c89a38229ecb92; 2f487712b89376fce267223bbb0db93d393d4b09 преди 36ec4fdd6250dcd5e73eb09ea92ed92e9cc28412; 2f487712b89376fce267223bbb0db93d393d4b09 преди 575faea557f1a184a5f09661bd47ebd3ef3769f8; 2f487712b89376fce267223bbb0db93d393d4b09 преди 3bcf7aca63f0bcd679ae28e9b99823c608e59ce3; 2f487712b89376fce267223bbb0db93d393d4b09 преди a2ea1ef0167d7a84730638d05c20ccdc421b14b6; 2f487712b89376fce267223bbb0db93d393d4b09 преди 1b6f13f626665cac67ba5a012765427680518711; 2f487712b89376fce267223bbb0db93d393d4b09 преди e0bb732eaf77f9ac2f2638bdac9e39b81e0a9682; 2f487712b89376fce267223bbb0db93d393d4b09 преди 48a5fe38772b6f039522469ee6131a67838221a8
- Linux Linux: 4.15; преди 4.15; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.169 до 6.1.*; 6.6.135 до 6.6.*; 6.12.82 до 6.12.*; 6.18.23 до 6.18.*; 6.19.13 до 6.19.*; от 7.0 нататък
Вид слабост
История
- 24 април 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-31662
- https://nvd.nist.gov/vuln/detail/CVE-2026-31662
- https://git.kernel.org/stable/c/a7db57ccca21f5801609065473c89a38229ecb92
- https://git.kernel.org/stable/c/36ec4fdd6250dcd5e73eb09ea92ed92e9cc28412
- https://git.kernel.org/stable/c/575faea557f1a184a5f09661bd47ebd3ef3769f8
- https://git.kernel.org/stable/c/3bcf7aca63f0bcd679ae28e9b99823c608e59ce3
- https://git.kernel.org/stable/c/a2ea1ef0167d7a84730638d05c20ccdc421b14b6
- https://git.kernel.org/stable/c/1b6f13f626665cac67ba5a012765427680518711
- https://git.kernel.org/stable/c/e0bb732eaf77f9ac2f2638bdac9e39b81e0a9682
- https://git.kernel.org/stable/c/48a5fe38772b6f039522469ee6131a67838221a8